Mario J. Molina, an environmental chemist who dedicated his life to explaining and solving key societal challenges, died October 7, 2020. He was 77 years old. Molina showed how chloro fluorocarbons (CFCs) were destroying Earth's protective ozone layer over Antarctica and worked to ban them. He also spearheaded efforts to improve air quality in Mexico, the United States, and Asia. He was one of the first to sound the alarm that continuing business as usual would likely lead to a climate catastrophe. With his passing, the world has lost a tireless advocate for our environment. Source: Kimberly A. Prather

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